20213331123 has 16 divisors (see below), whose sum is σ = 27053913600. Its totient is φ = 13424244960.

The previous prime is 20213331121. The next prime is 20213331133. The reversal of 20213331123 is 32113331202.

It is not a de Polignac number, because 20213331123 - 2¹ = 20213331121 is a prime.

It is a super-2 number, since 2×20213331123² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20213331123.

It is not an unprimeable number, because it can be changed into a prime (20213331121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 896968 + ... + 919226.

It is an arithmetic number, because the mean of its divisors is an integer number (1690869600).

Almost surely, 2^20213331123 is an apocalyptic number.

20213331123 is a deficient number, since it is larger than the sum of its proper divisors (6840582477).

20213331123 is a wasteful number, since it uses less digits than its factorization.

20213331123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23402.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20213331123 its reverse (32113331202), we get a palindrome (52326662325).

The spelling of 20213331123 in words is "twenty billion, two hundred thirteen million, three hundred thirty-one thousand, one hundred twenty-three".